Munnsville, New York has a Humid Continental Mild Summer, Wet All Year climate (Köppen classification: Dfb). Average annual temperatures range from 3.1 °C (low) to 13.8 °C (high). Annual precipitation averages 1160.5 Millimeters. Munnsville is located in USDA Plant Hardiness Zone 5b. The growing season typically runs from the last frost around May 1 - May 10 through the first frost around Oct. 1 - Oct. 10.
| Month | Avg. Low | Avg. High | Avg. Precip |
|---|---|---|---|
| January | -10.1 °C | -0.7 °C | 76.71 mm |
| February | -9.4 °C | 0.6 °C | 68.58 mm |
| March | -5.2 °C | 5.1 °C | 84.84 mm |
| April | 1.5 °C | 13 °C | 93.98 mm |
| May | 7.8 °C | 20.3 °C | 99.82 mm |
| June | 12.9 °C | 24.9 °C | 117.35 mm |
| July | 15.5 °C | 27.4 °C | 111.25 mm |
| August | 14.7 °C | 26.5 °C | 109.22 mm |
| September | 10.7 °C | 22.7 °C | 104.65 mm |
| October | 4.9 °C | 15.3 °C | 113.54 mm |
| November | -0.5 °C | 8.4 °C | 89.92 mm |
| December | -5.7 °C | 2.3 °C | 90.68 mm |
| Annual | 3.1 °C | 13.8 °C | 1160.54 mm |
| Average First Frost Date | Oct. 1 - Oct. 10 |
| Average Last Frost Date | May 1 - May 10 |
| Average Days With Frost | 150-180 Days |
| Plant Hardiness Zone | Zone 5b : -26.1°C to -23.3°C |
| Plant Hardiness Zone - 2012 | Zone 5a : -28.9°C to -26.1°C |
| Current Drought Conditions | Normal |
| Köppen Climate Classification | Dfb - Humid Continental Mild Summer, Wet All Year |